X-ALT APPLICATION No.3
X-ALT APPLICATION No.3
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This application is similar to application No.2, except that by using the Captain it is now possible to monitor 3 separate battery banks and control two alternators. As in previous examples the Captain will work with the normal diode splitters but precautions must be taken to ensure that any voltage drop caused by the diode splitter and cabling is not in excess of 1.2/1.5 volts. As the Captain will attempt to compensate for the voltage drop it will increase the output of the alternator to over come the voltage drop and if the voltage drop is to high it may cause the Captain to go into a high alternator or battery output alarm condition which is set at a nominal 16.3 volts. Under these conditions the Captain will switch off and the charging system will remain in float control only. When in float mode the batteries may only see a charging voltage of 13/ 13.4 volts if a diode splitter is used instead of 14/14.2 volts in the case of an X-SPLIT this results in an extended re-charge time.
As the Captain controls the output of the alternator, connection of the 3 battery sense leads 'red', 'green' & 'yellow' (on the circuit) should be connected to battery terminals that always see the alternator's output. The Captain can be used on a single or dual battery bank system simply by connecting the sense leads together in the correct format. If a two battery bank application is used we advise that the 'yellow' & 'green' (domestic battery 1 & battery 2) are connected together, making the engine start battery 'red' sense wire.
The control wiring of the Captain can be interfaced to most standard alternators, see alternator page by clicking on alternators for a list of known alternator configurations, if your alternator is not listed go to the installation page for further information or contact our technical department for advice.
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